Everyday math · expressions
Scientific calculator, without the app.
Trigonometry, logs, powers, factorials and memory in one browser calculator. Choose degrees or radians and keep a short history.
Scientific calculator
Type an expression or use the keys. Angles follow the DEG/RAD setting.
History
Your last 12 calculations stay on this device.
Good to know
The result is a guide, not a guarantee.
This calculator runs entirely in your browser. Check the assumptions, keep the inputs realistic, and use the result as a starting point for a decision.
Results are rounded for display. Very large or very small values switch to scientific notation.
What can the scientific calculator evaluate?
It handles arithmetic, powers, square and cube roots, factorials, percentages, logarithms, exponential functions and trigonometry, including inverse and hyperbolic functions. It also supports constants such as pi and e.
What is the difference between degree and radian mode?
Degree mode treats a full turn as 360 degrees. Radian mode treats a full turn as 2π radians. The mode affects sin, cos, tan and their inverses. For example, sin(30) is 0.5 in degree mode but about -0.988 in radian mode.
Why does tan(90) show an error in degree mode?
The tangent function is undefined at 90 degrees (and at 270 degrees, and so on) because it would divide by zero. The calculator reports that instead of returning a misleadingly large number.
What does the percent key do?
A percent sign divides the value before it by 100. So 50% becomes 0.5, and 200 × 10% becomes 20. It is a postfix operator, not a separate percentage-change mode.
Does the calculator use my expression anywhere else?
No. Expressions are parsed and evaluated in your browser. Nothing is uploaded, and history is kept only in the page state rather than a server.
Can I use the keyboard?
Yes. Digits, decimal points, operators, parentheses, percent, factorial, Enter, Backspace and Escape work while the page has focus. Function names such as sin and log are available from the on-screen keys.
Does it graph equations?
No. This is an expression calculator, not a graphing calculator. It returns a numeric result for the expression you enter.